❶ 求英语高手帮我用英语翻译一篇文章(毕业设计的英文文献)
你好 翻译如下 按照你提供的网站 好长啊 先生 ！！！ 累死我了,这么少分.
请注意,下面有中文字幕,图片我没帮你弄 因为都是数字,不需要翻译吧.
希望我能帮到你
Abstract: This paper describes the first measurement data obtained by the functional relationship between the two methods of expression; and then combined with a detailed description of examples of MATLAB a powerful question in this application.
Keywords: MATLAB; measurements; curve fitting; interpolation
I. INTRODUCTION
Under normal circumstances, obtained by measuring only the independent variables X in a number of discrete points on the function Yi (i = 0,1,2 ,...)。 In many applications, but also often measured according to these data, the basis of the analysis to obtain independent variables X and Y dependent variable relationship between the expression of the approximate function (also known as the empirical formula or mathematical model) Y = F (X), computer or scientific research personnel in order to use it to easy analysis or calculation. On the solution of this problem in two ways: 1. Interpolation. Assumed that the measurements are accurate, the requirements in some way to describe the data between data points. 2. Curve fitting. Assumed that the known laws of curves, the best approximation for the curve, but it does not need after all the data points.
MathWorks Inc. MATLAB is introced in the United States an easy-to-use engineering computing language, it is based on matrix calculation, the calculation, visualization, programming into an interactive environment can be achieved in engineering computing, simulation, data analysis and visualization, mapping, application development and other functions. MATLAB in the United States and other developed countries, the university has become a must to master the basic programming language, and in research and design units abroad, but also has long been a research and engineering calculations to solve the problem of a standard software.
Introction to MATLAB in the following measurement data processing applications.
Second, curve fitting
In general, measured by the test data is often a measurement error, such as the requirements of curve through all data points, in fact, it retains all the measurement error, and this is not what we want. Therefore, curve fitting, the fitting curve does not require must be by measuring the data points, and only data points in the measurement error of Xi on the di = F (Xi)-Yi (i = 0,1 ,..., m) by a certain minimum standard, so that it can reflect the trend of discrete data, as far as possible to avoid local fluctuations. Curve fitting method is to deal with projects of a practical measurement data mathematical methods.
The quality of curve fitting is usually always the principle of least squares as a measure of the criteria, because the method in the calculation of other criteria for admission than it convenient and much simpler, and there is sufficient accuracy.
In MATLAB to provide a least-squares polynomial curve fitting function polyfit (x, y, n). Of which: x, y are two vectors, including the fitting to be the x and y data; n is the order of the polynomial; function value of the coefficient of polynomial fitting. The following example to introce the usage of this function.
At present, the domestic proction of low-loss small and medium-sized power transformer core material are basically cold-rolled grain-oriented silicon steel sheet Z10-0.35, following a brief introction on the model of the excitation unit weight of steel capacity Qt (unit: V / kg ) and the core flux density of Bt (unit: Tesla) the relationship between the fitting curve.
Qt and the relationship between Bt as shown in the table below:
这部分是那图片来的,图片我就不帮你翻译了
自己看吧 反正都是微积分的简单题目
以下是图片以下开始的翻译
Steps:
(1) first in the command window to create a vector of measurement data.
Bt = 1.43:0.01:1.80;
Qt = [1.62 1.67 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.10 2.16 2.24 2.32 2.42 2.54 2.70 2.85 3.00 3.25 3.45 3.70 4.00 4.32 4.70 5.00 5.50 6.00 6.60 7.20 8.00 8.70 9.50 10.50 11.70 12.80 14.30 16.00 17.50];
(2) mapping function and then plot graph.
plot (Bt, Qt, 'x');
The measured data points in the cross shown in Figure, can be seen in their distribution was non-linear.
(3) choice of polynomial order of n 2, the calculation of the coefficient polynomials.
n = 2;% n is the order of polynomial
P = polyfit (Bt, Qt, n)% calculation of n-order polynomial curve fitting coefficient
P =
177.0320 -537.0538 408.7708
That is polynomial for Qt = 177.0320Bt2-537.0538Bt +408.7708.
(4) fit drawing graphics.
z = polyval (P, Bt);% function polyval the Bt used to calculate the value of the polynomial
plot (Bt, Qt, 'x', Bt, z ,'--')% after rendering graphics curve fitting
Map after the dotted line for the curve fitting.
(5) if the fitting result is not satisfactory, then a graal increase in the order of the polynomial n, repeat steps (3), (4).
In this paper, the fourth-order polynomial fitting, fitting function derived from the expression as follows:
Qt = 1587Bt4-9623Bt3 +21919 Bt2-22216Bt +8453
Solid line based on the type of the curve after fitting. Clearly, the 4-order polynomial fitting of the results much better than the 2 bands.
In theory, n +1 data points can be uniquely determined n-order polynomial. In fact, if the order of polynomial is too high, although the data points to see the effect, but there will be data points of data between the oscillations, but the calculation time; but if the choice of order too small, then to be All effects bad. Therefore there is a reasonable choice of the order of the problem.
Third, interpolation
Interpolation method can be easily measured data to the data between the valuation function.
MATLAB provides a curve interpolation function interp1 (x, y, x0, 'method'), in which: x, y data points for the measurement; x0 is a need for a numerical array interpolation; method for the interpolation algorithm, there are the following three options: linear interpolation ( 'linear'), cubic spline interpolation ( 'spline'), cubic polynomial interpolation ( 'cubic'), default is linear interpolation. The return value of function after interpolation function corresponding to the value of x0.
For example, the need to calculate when Bt = 1.655 when the value of Qt.
Using linear interpolation:
Qt = interp1 (Bt, Qt, 1.655, 'linea')
Get Qt = 4.5100
Using cubic spline interpolation:
Qt = interp1 (Bt, Qt, 1.655, 'spline')
Get Qt = 4.5163
Note that spline interpolation with the above results as shown in the results of different linear interpolation. In general, when the measurement of the distribution of data points with good linearity, the linear interpolation should be selected speed; otherwise, to use the cubic spline interpolation or cubic polynomial interpolation.
Polynomial interpolation in the signal processing and image processing applied more widely.
Fourth, the conclusions
As can be seen from using MATLAB to process the measurement data is simple, fast and intuitive. Which, in accordance with the principle of least-squares fitting of the graphics used for the test report or manual calculations to find, come to the polynomial for the theoretical analysis or the use of CAD procts. The method is also suitable for other instries to deal with curves in the chart, and to meet the project accuracy requirements.
❷ 仿写这篇英语作文
你可以下在一个作业帮，拍照搜，我搜的没有作文题目要求啥的，都被当成作文理解来搜了
❸ 请帮我用英语翻译一段话，毕业设计要的，要非常工整，如果这段英文能定稿的话我再加分。
With the accelerated pace of the domestic information technology, combined with the logistics enterprise of the instry's growing demand for information, make the rapid development of logistics information network. Such network's timeliness, accuracy and exactly in line satisfies the requirements of the instry, which makes it the main source of information logistics.
Logistics Information Network provides all kinds of features, like querying the logistics instry information and the supply and demand information, helping businesses understand more dynamic information , improving the efficiency of running, which lets companies have more chances to adjustment the market strategy to meet the business dynamic development.
❹ 英语作文仿写
do u like 2 work hard? do u like 2 work in a uniform? do u like 2 serve 4 the society? If your answer is positive, then we got a perfect choice for you ---to be a police officer.
Call New York Police Department at 911-9911
❺ 仿写英文短篇小说，1200词，两天，急需！！！！注意是英文！！！有人能帮忙吗
放弃吧，没人闲的干这个
除非你直接给钱找人给你写
❻ 求150字的英语作文 关于毕业设计的 包括主题 灵感来源 等 急求
11月2日星期二阴
昨天晚上，我让妈妈准备了一些绿豆、黑豆、黄豆和玉米，开始做种子发芽试验。
我把它们放在一个玻璃杯里，然后往杯子里冲了大约三厘米的水，让种子在水里浸泡了一个晚上。今天早上，我把浸泡种子的水倒掉后，把种子放在一个盘子里，上面盖上一块湿毛巾。
今天下午放学后，我仔细观察了它们，发现它们已经有变化了，首先是这些种子比原来大了许多，再仔细一看，黄豆和黑豆都裂开了一层皮，而绿豆已经开始抽出了一点点新芽，玉米看上去没什么变化。
11月3日星期三阴
昨天晚上我观察完后，为了给种子保温，我听从妈妈建议，把装种子的盘子藏在高压锅里。
时间已过去了一天一夜，不知种子是否有新的变化。我小心翼翼地从高压锅里拿出装种子的盘子，轻轻揭开盖在盘子上的湿毛巾，哇噻!我的绿豆芽变长了，绿豆都长出了一条弯弯曲曲的白色的小尾巴，好像豆里钻出了一条白色的小虫子，整个绿豆看起来又像一只绿色的小蝌蚪。而黄豆、黑豆、玉米看上去和昨天晚上我观察的情况基本一样，没有太大变化，我有些担心它们是否会发芽。
观察完后，我又给它们浇了一点水，重新放回高压锅中，心里盼望着黄豆、黑豆和玉米快快发芽，盼望绿豆芽快快长大。
11月4日星期四多云
时间过去了一天一夜，我的绿豆芽又长大了一些，形状也有些变化了，有些绿豆的小尾巴由弯弯曲曲变成直直的了，看起来像一只独角犀牛的头。我量了量绿豆芽枝的长度，已经有一厘米长了。而黄豆、黑豆仍然没有明显的变化，玉米粒表面上出现了一些小黑点，不知道它们是不是要发芽了。
11月5日星期五晴
今天晚上，我又观察了我的种子发芽情况。
绿豆芽的长势依然很好，长度已经超过了一厘米，有一半的绿豆种子脱去了绿色的外壳，整个种子的颜色变成了白里透着黄，看上去非常娇嫩。而黄豆、黑豆仍然没有发芽，昨天晚上在玉米种子上我发现的黑点，经过仔细观察，原来是要腐烂的霉点，真是扫兴，原来我以为它要发芽了。
11月6日星期六晴
时间已经过去了五天五夜，但是黄豆、黑豆和玉米仍旧没有发芽，为了给绿豆芽提供一个更好的生长环境，今天晚上，我听从妈妈的提议，把没有发芽的黄豆、黑豆和玉米都从盘子里挑了出来，扔进了垃圾筒，并把盘里的绿豆芽用水冲洗了一下。
冲洗过后的绿豆芽，看上去它的长势更好了，我盼望明天绿豆芽的芽尖上能长出两片小叶子。
11月7日星期日晴
今天是我观察种子发芽的最后一天。
绿豆芽的长势仍旧很好，芽枝的长度已经有两厘米了，但它们的芽尖上仍然没有长出两片小叶子。看着娇嫩的绿豆芽，我想如果做成菜，一定非常好吃，但我舍不得吃，决定把它们都种在家里的花盆中，有了土壤的营养，我想它们一定会长出小叶子来的。
通过大约一星期的仔细观察，我知道了种子发芽一定要有合适的湿度、温度和营养，如果达不到种子发芽所需要的基本条件，就不会发芽了。
❼ 仿写英语短文
HOU Did Lids Spend the Weekend?
Last Friday,we asked twenty students at NO.1 Senior High School what they did their homework. For most students,the weekend was fun.On Saturday morning, ten students watch televison. On Saturday afternoon,five kids went playing ,and three study.Tow kids also visited their grandparents. On Saturday evening ,four students watched a cartoon or play football with their friends.On Sunday ,three students played computer games at home,two students went shopping,and slept .
❽ 仿写英语文章
I wrote a letter to my father yesterday.I told him that I am living in school now and I would come back home soon. If he comes to my school, I will be very happy.My father is living in the old house in a little city.The house was completed over 20 years ago.The house is really rable.There are five people living in the house now.Outside the house, there is a big tree and some flowers.It must be the most beautiful old house in that area.
知识点包括了：一般过去时的用法，现在进行时的用法，一般将来时的用法，if的用法，there be 句型的用法，情态动词must的用法，系表结构的用法等。
❾ 毕业设计可以仿写那些大的网站吗
做个小软件小系统啥的就行了，一般不要模仿那些大网站。一个是技术上你达不到，再一个功能太多，在毕设这个层次上也没必要。而且从导师的角度来说，他会要求你毕设的题目尽量专一点儿，能体现技术并且贴近实际应用就可以，不要搞得很大，反而不容易通过。
❿ 仿写英语作文
Having determination makes you significance because it not only improves you a better person than before but also simplifies your life. From my own plan, I am going to determine to build up four resolutions. First of all, I will improve myself and develop some new hobbys. For example, singing is a good idea as.........(加上原因)
上面那个原文是你自己写的吗？感觉没有连词和逻辑词，回好像句子凑到一起的答